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Plugging material used for oil base drilling fluid, and preparation method thereof

An oil-based drilling fluid and plugging material technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems that affect the safety and speed of drilling engineering, the oil-based drilling fluid is expensive, and prolong the drilling and well construction period. and other problems, to achieve the effect of good suspension stability, low density and good lipophilicity

Active Publication Date: 2013-04-03
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type of plugging agent made from an oily liquid called petroleum jelly or grease improves its properties such as ability to absorb water vapor without losing it when used during wellbore operations. It also helps prevent damage caused by debris that may be found inside formations being drilled through with this tool. Additionally, there are some benefits over existing methods like cementing plugs: they have better resistance against corrosion compared to other materials due to their hydrophobic nature, less weight per unit volume, lower cost, longer lifespan, higher efficiency at stopping cracks while maintaining sufficient hydraulics.

Problems solved by technology

This patented technical problem addressed in both the current methods described above relates to improving the efficiency at stopping flow from underground formations during drill operations while also addressing issues related to oil- based drilling mud (OBM) lost circulating that occurs frequently over time without being able to stop it properly. Existing solutions like adding plugging substances may harm healthy areas near producing fields where hydrocarbon contaminated groundwater flows through them.

Method used

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  • Plugging material used for oil base drilling fluid, and preparation method thereof
  • Plugging material used for oil base drilling fluid, and preparation method thereof
  • Plugging material used for oil base drilling fluid, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A preparation method of plugging material for oil-based drilling fluid:

[0068] (1) Dissolve 1.8g of dispersant polyvinyl alcohol in 180ml of distilled water at 80°C;

[0069] (2) Add 15g of butyl acrylate, 15g of octadecyl acrylate, 15g of butyl methacrylate, 7g of styrene, and 8g of acrylonitrile into (1), and stir at a high speed of 3000r / min to form a uniform and stable dispersion system;

[0070] (3) Add 3g of porogen ethyl acetate, 0.1g of crosslinking agent divinyl styrene, and 0.1g of initiator benzoyl peroxide to the dispersion system obtained in (2), and stir the above mixed solution with a mixer for 10min to make fully dissolved in the system;

[0071] (4) Put the above liquid into a 500ml wide-mouth Erlenmeyer flask, protect it with nitrogen, put it in a water bath at 80±5°C and heat it, and react for 8 hours to obtain the preliminary product;

[0072] (5) Washing of the product: Wash the product with 70-80°C water to remove excess impurities;

[0073] (...

Embodiment 2

[0075] A preparation method of plugging material for oil-based drilling fluid:

[0076] (1) Dissolve 0.9g sodium lauryl sulfate and 0.9g polyethylene glycol in 180ml distilled water at 80°C;

[0077] (2) Add 20g ethyl acrylate, 20g stearyl acrylate, 5g methyl methacrylate, 5g stearyl methacrylate, 10g stilbene into (1), stir at 3000r / min at high speed to form a uniform and stable decentralized system;

[0078] (3) Add 3g of porogen toluene, 0.1g of crosslinking agent divinylstyrene, 0.1g of azobisisoheptanonitrile to the dispersion system obtained in (2), and stir the above mixture with a mixer for 10min to fully dissolve it. in the system;

[0079] (4) Put the above liquid into a 500ml wide-mouth Erlenmeyer flask, protect it with nitrogen, put it in a water bath at 80±5°C and heat it, and react for 8 hours to obtain the preliminary product;

[0080] (5) Washing of the product: Wash the product with 70-80°C water to remove excess impurities;

[0081] (6) After the product ...

Embodiment 3

[0083] A preparation method of plugging material for oil-based drilling fluid:

[0084] (1) Dissolve 0.9g polyacrylamide and 0.9g polyvinyl alcohol in 180ml distilled water at 80°C;

[0085] (2) Add 30g methyl acrylate, 10g octadecyl acrylate, 10g ethyl methacrylate, 5g butyl methacrylate, 2g stilbene and 3g butadiene to (1), stir at 3000r / min, Form a uniform and stable dispersion system;

[0086] (3) Add 3g of paraffin wax, 0.1g of crosslinking agent silicone crosslinking agent WD-20, 0.02g of potassium persulfide and 0.08g of tert-butyl hydroperoxide to the dispersion system obtained in (2), and stir the above mixture with a mixer solution for 10 minutes to fully dissolve it in the system;

[0087] (4) Put the above liquid into a 500ml wide-mouth Erlenmeyer flask, protect it with nitrogen, put it in a water bath at 80±5°C and heat it, and react for 8 hours to obtain the preliminary product;

[0088] (5) Washing of the product: Wash the product with 70-80°C water to remove...

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Abstract

The invention relates to a plugging material used for oil base drilling fluid and a preparation method of the plugging material. The plugging material is prepared by the raw materials consisting of a dispersing agent, acrylate, methacrylate, a pore-foaming agent and an organic monomer, wherein the organic monomer is one or two selected from styrene, stilbene, acrylonitrile and butadiene. The plugging material used for oil base drilling fluid, which is prepared according to the preparation method, is excellent in lipophilicity and low in density, has excellent suspension stability, has high strength before and after oil absorption, has certain viscosity to rocks, and can effectively plug stratum cracks so as to achieve the plugging purpose.

Description

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Claims

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Application Information

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Owner CHINA UNIV OF PETROLEUM (BEIJING)
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